round a number to the nearest ten thousandth in csharp

In C#, you can round a number to the nearest ten thousandth using the Math.Round method with a specified precision. The precision is the number of digits to round to after the decimal point. To round to the nearest ten thousandth, set the precision to 4 (since a ten thousandth is one digit after the fourth decimal place).

Here's an example code snippet that rounds a decimal number num to the nearest ten thousandth:

main.cs
decimal num = 1234.56789M;
int precision = 4;
decimal roundedNum = Math.Round(num, precision);
Console.WriteLine(roundedNum); // Output: 1234.5679
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Note that the M after the number literal 1234.56789M indicates that it is a decimal type. If you don't include the M, the number will be treated as a double type, which may result in precision errors.